Blisk

The Blisk were a mythical species of crustacean aliens which were said to have invaded Earth in 1908 before being eradicated in 1969. According to the tale, millenia ago, the ocean world of Mars was ruled by the Blisk, who had an underwater paradise there. The Blisk were more than cocky about it, leading to war with the warlike Furon Empire; the Furon reduced Mars to desert and wiped the Blisk out. Most of the Blisk warships were obliterated, but one of them crash-landed on Earth, causing the mysterious Tunguska blast of 1908. Since then, the conspiracy theory claims that the Blisk became shapeshifters, taking on human form to rule the Soviet Union through becoming its premiers (Joseph Stalin, Georgy Malenkov, Nikita Khrushchev, Leonid Brezhnev, etc.); the hive-minded Blisk had already embraced a form of collectivism, leading to their embrace of communism. In 1969, the Furon discovered that the Blisk were still alive, and that they were plotting to conquer the world. The Blisk shapeshifters took over the USSR and initiated the Cold War with the goal of world destruction, aiming at provoking nuclear warfare with the United States under the guise of revolution, but really intending to create a catastrophic third world war which would leave all of humanity wiped out. At the same time, the Blisk manipulated the USSR into initiating nuclear testing in Siberia, planning to create a radiation meltdown to render the world uninhabitable to humans, as the Blisk were impervious to radiation. Their ultimate plan was to colonize Earth and turn it into their new home planet, but their plots were discovered by the Furon Cryptosporidium in 1969, and "Crypto" succeeded in annihilating their presence on Earth and on the Moon.